diff --git a/changelog/unreleased/PR#3104-update-org-apache-rat-apache-rat.yml b/changelog/unreleased/PR#3104-update-org-apache-rat-apache-rat.yml
new file mode 100644
index 000000000000..bca0c014cd6c
--- /dev/null
+++ b/changelog/unreleased/PR#3104-update-org-apache-rat-apache-rat.yml
@@ -0,0 +1,7 @@
+title: Update org.apache.rat:apache-rat to v0.18
+type: dependency_update
+authors:
+- name: solrbot
+links:
+- name: PR#3104
+  url: https://github.com/apache/solr/pull/3104
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 0cef094b1e52..c9234d2fa7e2 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -41,7 +41,7 @@ apache-kafka = "3.9.2"
 apache-log4j = "2.26.0"
 apache-lucene = "10.4.0"
 apache-opennlp = "2.5.10"
-apache-rat = "0.15"
+apache-rat = "0.18"
 apache-tika = "3.3.1"
 apache-tomcat = "6.0.53"
 apache-zookeeper = "3.9.5"